xpcom/base/FunctionTimer.cpp

   1 /* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
   6  * 1.1 (the "License"); you may not use this file except in compliance with
   7  * the License. You may obtain a copy of the License at
   8  * http://www.mozilla.org/MPL/
   9  *
  10  * Software distributed under the License is distributed on an "AS IS" basis,
  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12  * for the specific language governing rights and limitations under the
  13  * License.
  14  *
  15  * The Original Code is Mozilla code.
  16  *
  17  * The Initial Developer of the Original Code is
  18  * Mozilla Corporation.
  19  * Portions created by the Initial Developer are Copyright (C) 2009
  20  * the Initial Developer. All Rights Reserved.
  21  *
  22  * Contributor(s):
  23  *   Vladimir Vukicevic <vladimir@pobox.com>
  24  *
  25  * Alternatively, the contents of this file may be used under the terms of
  26  * either the GNU General Public License Version 2 or later (the "GPL"), or
  27  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  28  * in which case the provisions of the GPL or the LGPL are applicable instead
  29  * of those above. If you wish to allow use of your version of this file only
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  34  * the provisions above, a recipient may use your version of this file under
  35  * the terms of any one of the MPL, the GPL or the LGPL.
  36  *
  37  * ***** END LICENSE BLOCK ***** */
  38
  39 // needed to get vsnprintf with glibc
  40 #ifndef _ISOC99_SOURCE
  41 #define _ISOC99_SOURCE
  42 #endif
  43
  44 #include <stdarg.h>
  45 #include <stdio.h>
  46 #include <string.h>
  47
  48 #include "prenv.h"
  49
  50 #include "mozilla/FunctionTimer.h"
  51
  52 #ifdef _MSC_VER
  53 #define vsnprintf _vsnprintf
  54 #include <windows.h>
  55 #include <mmsystem.h>
  56 #endif
  57
  58 using namespace mozilla;
  59
  60 // This /must/ come before the call to InitTimers below,
  61 // or its constructor will be called after we've already
  62 // assigned the Now() value to it.
  63 static TimeStamp sAppStart;
  64
  65 nsAutoPtr<FunctionTimerLog> FunctionTimer::sLog;
  66 char *FunctionTimer::sBuf1 = nsnull;
  67 char *FunctionTimer::sBuf2 = nsnull;
  68 int FunctionTimer::sBufSize = FunctionTimer::InitTimers();
  69 unsigned FunctionTimer::sDepth = 0;
  70
  71 int
  72 FunctionTimer::InitTimers()
  73 {
  74     if (PR_GetEnv("MOZ_FT") == NULL)
  75         return 0;
  76
  77     // ensure that this is initialized before us
  78     TimeStamp::Startup();
  79
  80     sLog = new FunctionTimerLog(PR_GetEnv("MOZ_FT"));
  81     sBuf1 = (char *) malloc(BUF_LOG_LENGTH);
  82     sBuf2 = (char *) malloc(BUF_LOG_LENGTH);
  83     sAppStart = TimeStamp::Now();
  84
  85     return BUF_LOG_LENGTH;
  86 }
  87
  88 FunctionTimerLog::FunctionTimerLog(const char *fname)
  89     : mLatest(sAppStart)
  90 {
  91     if (strcmp(fname, "stdout") == 0) {
  92         mFile = stdout;
  93     } else if (strcmp(fname, "stderr") == 0) {
  94         mFile = stderr;
  95     } else {
  96         FILE *fp = fopen(fname, "wb");
  97         if (!fp) {
  98             NS_WARNING("FunctionTimerLog: Failed to open file specified, logging disabled!");
  99         }
 100         mFile = fp;
 101     }
 102
 103 #ifdef _MSC_VER
 104     // Get 1ms resolution on Windows
 105     timeBeginPeriod(1);
 106 #endif
 107 }
 108
 109 FunctionTimerLog::~FunctionTimerLog()
 110 {
 111     if (mFile && mFile != stdout && mFile != stderr)
 112         fclose((FILE*)mFile);
 113
 114 #ifdef _MSC_VER
 115     timeEndPeriod(1);
 116 #endif
 117 }
 118
 119 void
 120 FunctionTimerLog::LogString(const char *str)
 121 {
 122     if (mFile) {
 123         mLatest = TimeStamp::Now();
 124         TimeDuration elapsed = mLatest - sAppStart;
 125         fprintf((FILE*)mFile, "[% 9.2f] %s\n", elapsed.ToSeconds() * 1000.0, str);
 126     }
 127 }
 128
 129 TimeDuration
 130 FunctionTimerLog::LatestSinceStartup() const
 131 {
 132     return mLatest - sAppStart;
 133 }
 134
 135 int
 136 FunctionTimer::ft_vsnprintf(char *str, int maxlen, const char *fmt, va_list args)
 137 {
 138     return vsnprintf(str, maxlen, fmt, args);
 139 }
 140
 141 int
 142 FunctionTimer::ft_snprintf(char *str, int maxlen, const char *fmt, ...)
 143 {
 144     va_list ap;
 145     va_start(ap, fmt);
 146
 147     int rval = ft_vsnprintf(str, maxlen, fmt, ap);
 148
 149     va_end(ap);
 150
 151     return rval;
 152 }